gastrinoma
noun
gas·tri·no·ma
| \ ˌgas-trə-ˈnō-mə
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plural gastrinomas
also gastrinomata\ -mət-ə
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Medical Definition of gastrinoma
: a tumor that often involves blood vessels, usually occurs in the pancreas or the wall of the duodenum, and produces excessive amounts of gastrin which stimulates gastric-acid secretion and consequent formation of ulcers especially in the duodenum and the jejunum — see zollinger-ellison syndrome